Struct variant need to matched as such

See rust-lang/rust#19087

Author: dzamlo

src/lib.rs

@@ -24,8 +24,8 @@ enum Field {
 impl Field {
     fn bit_len(&self) -> u64 {
        match *self {
-          Field::ArrayField(_, count, element_length) => (count as u64) * element_length as u64,
-          Field::ScalarField(_, length) => length as u64,
+          Field::ArrayField{name: _, count, element_length} => (count as u64) * element_length as u64,
+          Field::ScalarField{name: _, length} => length as u64,
        }
     }
 
@@ -108,7 +108,7 @@ impl Field {
    fn to_methods(&self, cx: &mut ExtCtxt, start: u64) -> Vec<P<ast::Method>> {
        let mut methods = vec![];
        match *self {
-           Field::ArrayField(ref name, count, element_length) => {
+           Field::ArrayField{ref name, count, element_length} => {
                let (element_type, value_type_length) = size_to_ty(cx, element_length).unwrap();
                let value_type = make_array_ty(cx, &element_type, count);
                let getter_name = "get_".to_string() + *name;
@@ -158,7 +158,7 @@ impl Field {
                methods.push(setter);
 
            },
-           Field::ScalarField(ref name, length) => {
+           Field::ScalarField{ref name, length} => {
                let (value_type, value_type_length) = size_to_ty(cx, length).unwrap();
                let getter_name = "get_".to_string() + *name;
                let getter_ident = token::str_to_ident(getter_name.as_slice());